Acid Molecular Sieves for Catalytic Flash Vacuum Pyrolysis

PAOLA L. LUCERO, HIPPASIA M. MOURA, E. LAURA MOYANO, HELOISE O. PASTORE

Foz do Iguazu

Congreso; 4th International IUPAC Conference on Green Chemistry; 2012

International Union of Pure and Applied Chemistry, Sociedade Brasileira de Quimica, Universidade Federal de San Carlos

Flash Vacuum Pyrolysis (FVP) consists of subjecting a molecule (in gas phase) to high temperature over a short period of time (10-2 s) without the use of solvents or additives. This process is suitable for synthetic purposes or for the study of reaction mechanisms. Catalytic Flash Vacuum Pyrolysis (CFVP) is a technique that consists in the study of thermal reactions in the presence of catalytic solids. In general this procedure allows a decrease in reaction temperature and the improvement in selectivity compared to homogeneous system (FVP).1 Moreover, CFVP is a clean and fast technique for the preparation of heterocycles in good yields and short reactions times. Additionally, in most cases the catalyst can be recovered and reused for several experiments. In these work we develop new CFVP systems applying Magadite, SAPO-37 and SBA-15 as catalytic molecular sieves to study the thermal reactivity of Imidazo[2,1-b][1,3,4]thiadiazole derivatives (1a-b).